Chanyeol gets embarrassed when he got caught stairing at Irene from Red Velvet on stage. When the camera moved over to him to catch it after she was done talking Chanyeol was covering up his face.
and might I add after staring at this picture . . . some one knows the camera is watching lol.

If you go to the article theirs a clip that shows it. For some reason it won't let me put it on the card.
link link link!

After people were putting up comments on Twitter, these are two the article used. lol.